#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream> 
using namespace std;
string fun()
{
	string ret;

	return ret;
}
int main()
{
	string s3 = fun();
	string s1;
	string s2("hello");
	cout << sizeof(s1) << endl;
	cout << sizeof(s2) << endl;
	return 0;
}